| commit | dbe32284ff4fb96906cdb121508eba668dbc5bae | [log] [tgz] |
|---|---|---|
| author | Cherry Zhang <cherryyz@google.com> | Thu Apr 04 00:29:16 2019 -0400 |
| committer | Cherry Zhang <cherryyz@google.com> | Fri Apr 19 18:25:56 2019 +0000 |
| tree | fa09a2d433fc587b5d90f5c7868dc5a2c24de5a5 | |
| parent | f957a7e3572435c7d7031df8c58f63ebb633ecf7 [diff] |
cmd/link: mmap object data This resurrects CL 121198, except that this time we map read-only. In case that we need to apply relocations to the symbol's content that is backed by read-only memory, we do our own copy- on-write. This can happen if we failed to mmap the output file, or we build for Wasm. Memory profile for building k8s.io/kubernetes/cmd/kube-apiserver on Linux/AMD64: Old (before this sequence of CLs): inuse_space 1598.75MB total 669.87MB 41.90% 41.90% 669.87MB 41.90% cmd/link/internal/objfile.(*objReader).readSlices New: inuse_space 1280.45MB total 441.18MB 34.46% 34.46% 441.18MB 34.46% cmd/link/internal/objfile.(*objReader).readSlices Change-Id: I6b4d29d6eee9828089ea3120eb38c212db21330b Reviewed-on: https://go-review.googlesource.com/c/go/+/170741 Run-TryBot: Cherry Zhang <cherryyz@google.com> Reviewed-by: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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